DK138349B - Low frequency gain circuit. - Google Patents

Low frequency gain circuit.

Info

Publication number
DK138349B
DK138349B DK358169AA DK358169A DK138349B DK 138349 B DK138349 B DK 138349B DK 358169A A DK358169A A DK 358169AA DK 358169 A DK358169 A DK 358169A DK 138349 B DK138349 B DK 138349B
Authority
DK
Denmark
Prior art keywords
low frequency
gain circuit
frequency gain
circuit
low
Prior art date
Application number
DK358169AA
Other languages
Danish (da)
Other versions
DK138349C (en
Inventor
Mead Clifford Killion
Elmer Victor Carlson
Mahlon Daniel Burkhard
Original Assignee
Industrial Res Prod Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrial Res Prod Inc filed Critical Industrial Res Prod Inc
Publication of DK138349B publication Critical patent/DK138349B/en
Application granted granted Critical
Publication of DK138349C publication Critical patent/DK138349C/da

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/523—Circuit arrangements for protecting such amplifiers for amplifiers using field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
    • H03F3/1855—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices with junction-FET devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DK358169AA 1968-07-03 1969-07-02 Low frequency gain circuit. DK138349B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74223968A 1968-07-03 1968-07-03

Publications (2)

Publication Number Publication Date
DK138349B true DK138349B (en) 1978-08-14
DK138349C DK138349C (en) 1979-01-29

Family

ID=24984024

Family Applications (1)

Application Number Title Priority Date Filing Date
DK358169AA DK138349B (en) 1968-07-03 1969-07-02 Low frequency gain circuit.

Country Status (7)

Country Link
US (1) US3512100A (en)
CH (1) CH490766A (en)
DE (1) DE1916703C3 (en)
DK (1) DK138349B (en)
FR (1) FR1597239A (en)
GB (1) GB1219299A (en)
NL (1) NL144107B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728496A (en) * 1970-05-05 1973-04-17 Westinghouse Electric Corp Thin film transistor phonograph amplifier
JPS5065343U (en) * 1973-10-16 1975-06-12
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly
US5097224A (en) * 1991-04-11 1992-03-17 Telex Communications, Inc. Self-biasing, low noise amplifier of extended dynamic range
JP3437237B2 (en) * 1994-01-21 2003-08-18 松下電器産業株式会社 Amplifier
US5446413A (en) * 1994-05-20 1995-08-29 Knowles Electronics, Inc. Impedance circuit for a miniature hearing aid
US5589799A (en) * 1994-09-29 1996-12-31 Tibbetts Industries, Inc. Low noise amplifier for microphone
US6023194A (en) * 1997-05-23 2000-02-08 Tibbetts Industries, Inc. Amplifier with reduced input capacitance
US7221766B2 (en) * 2002-04-15 2007-05-22 Knowles Electronics, Llc Microphone input buffer biasing circuit
US7092538B2 (en) * 2002-04-15 2006-08-15 Knowles Electronics, Llc Switched microphone buffer
US7688987B2 (en) * 2002-04-24 2010-03-30 Knowles Electronics, Llc Electret microphone buffer circuit with significantly enhanced power supply rejection
US8536924B2 (en) * 2010-09-02 2013-09-17 Fairchild Semiconductor Corporation High-impedance network
US8750537B2 (en) 2010-12-06 2014-06-10 Blackberry Limited Differential microphone circuit
US20120140956A1 (en) * 2010-12-06 2012-06-07 Research In Motion Limited Differential microphone circuit
US8829991B2 (en) 2011-01-14 2014-09-09 Fairchild Semiconductor Corporation DC offset tracking circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517863A (en) * 1944-10-12 1950-08-08 Darol K Froman Voltage supply circuit for vacuum tubes
US2927275A (en) * 1956-04-13 1960-03-01 Sonotone Corp Hearing aid transistor amplifiers
US3286189A (en) * 1964-01-20 1966-11-15 Ithaco High gain field-effect transistor-loaded amplifier

Also Published As

Publication number Publication date
CH490766A (en) 1970-05-15
DK138349C (en) 1979-01-29
NL144107B (en) 1974-11-15
NL6900623A (en) 1970-01-06
US3512100A (en) 1970-05-12
DE1916703A1 (en) 1970-01-29
DE1916703B2 (en) 1970-11-05
FR1597239A (en) 1970-06-22
DE1916703C3 (en) 1971-06-03
GB1219299A (en) 1971-01-13

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Legal Events

Date Code Title Description
PBP Patent lapsed